(19)
(11) EP 2 184 645 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
25.05.2011 Bulletin 2011/21

(43) Date of publication A2:
12.05.2010 Bulletin 2010/19

(21) Application number: 08000664.6

(22) Date of filing: 11.05.2005
(27) Previously filed application:
 11.05.2005 EP 05741240
(51) International Patent Classification (IPC): 
G03G 9/097(2006.01)
C08F 246/00(2006.01)
C08F 220/14(2006.01)
C08F 8/14(2006.01)
G03G 15/08(2006.01)
C08F 220/06(2006.01)
C07C 233/09(2006.01)
C07C 309/15(2006.01)
C07C 309/69(2006.01)
C08F 220/58(2006.01)
 C08F 20/58(2006.01)
C08F 212/08(2006.01)
C08F 8/34(2006.01)
G03G 13/20(2006.01)
G03G 15/20(2006.01)
C07C 231/02(2006.01)
C07C 303/26(2006.01)
C07C 309/51(2006.01)
C07C 309/76(2006.01)
G03G 9/087(2006.01)
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 12.05.2004 JP 2004142882

(60) Divisional application:
10011818.1 / 2292670

(62) Application number of the earlier application in accordance with Art. 76 EPC:
05741240.5 / 1749035

(71) Applicant: Canon Kabushiki Kaisha
Ohta-ku Tokyo (JP)

(72) Inventors:
  • Fukui, Tatsuki
    Tokyo (JP)
  • Kenmoku, Takashi
    Tokyo (JP)
  • Kusakari, Ako
    Tokyo (JP)
  • Mihara, Chieko
    Tokyo (JP)
  • Yano, Tetsuya
    Tokyo (JP)
  • Fujimoto, Norikazu
    Tokyo (JP)

(74) Representative: Weser, Thilo 
Weser & Kollegen Patentanwälte Radeckestrasse 43
81245 München
81245 München (DE)

   


(54) Charge control agent, toner, image forming method and image forming apparatus


(57) A charge control agent for controlling a charged state of powder contains a polymer having a unit having a structure represented by the chemical formula (19):

wherein R represents -A25-SO2R25. R25w, R25x, and R25y are selected from combinations described in the following items (i) and (ii).
For the item (i), A25 and R25 are selected from combinations described in the following items (i-A) and (i-B); for the item (ii), A25 and R25 are selected from combinations described in the following item (ii-A):
(i) R25w and R25x each represent a hydrogen atom, and R25y represents a CH3 group or a hydrogen atom;
(i-A) A25 represents a substituted or unsubstituted aliphatic hydrocarbon structure; R25 represents a halogen atom or OR25a where R25a represents a substituted or unsubstituted aliphatic hydrocarbon structure, a substituted or unsubstituted aromatic ring structure, or a substituted or unsubstituted heterocyclic structure;
(i-B) A25 represents a substituted or unsubstituted aromatic ring structure, or a substituted or unsubstituted heterocyclic structure; R25 represents OH, a halogen atom, ONa, OK, or OR25a where R25a represents a substituted or unsubstituted aliphatic hydrocarbon structure, a substituted or unsubstituted aromatic ring structure, or a substituted or unsubstituted heterocyclic structure;

(ii) R25w and R25X each independently represent a halogen atom or a hydrogen atom; R25y represents a CH3 group, a halogen atom, or a hydrogen atom; at least one of R25w, R25X, and R25y represents a halogen atom;
(ii-A) A25 represents a substituted or unsubstituted aliphatic hydrocarbon structure, a substituted or unsubstituted aromatic ring structure, or a substituted or unsubstituted heterocyclic structure; R25 represents OH, a halogen atom, ONa, OK, or OR25a where R25a represents a substituted or unsubstituted aliphatic hydrocarbon structure, a substituted or unsubstituted aromatic ring structure, or a substituted or unsubstituted heterocyclic structure.





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